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本文在重视土工织物较为松软这一固有特性的基础，进行了试验研究。提出了土工织物滤层和被保护土受压后皆发生不同程度的压密变形，透水性减小．但因材料性质、密度、压力大小的不同，各自渗透系数的减小量不同，对滤层排水功能的影响不同；压密变形，对防止被保护土颗粒流失的滤层功能是有利的。建议应用中应结合工程情况、材料性质、压力大小下测定反映实际的参数，进行滤层设计和选型，以达确保滤层功能和工程安全运行。
In this paper, emphasis is put on the inherent characteristics of geotextile more soft, the experimental study. It is proposed that the geotextile filter layer and the protected earth will have different degrees of compressive deformation after pressure, and the water permeability will be reduced. However, due to the difference of material properties, density and pressure, the decrease of permeability coefficient is different, which has different effect on drainage function of filter bed. Compressive deformation is beneficial to prevent the function of filter layer from being lost. The proposed application should be combined with engineering conditions, material properties, pressure measurement to reflect the actual parameters, filter design and selection, in order to ensure the filter function and project safety operation.